Hi Svetlana,

While we do get data from OSM, we run our own tile server called Kartotherian, mainly for the following reasons:

• OSM's infrastructure is fragile and has cache challenges
  
• Their datacenter is in London, which means latency becomes an issue
  
• OSM's rendering stack can't scale horizontally well enough to be sure they could handle our load
  
• Their map style is not mobile friendly
• We require multilingual and vector tiles, which their stack can't do (currently)
• We wanted to provide nicer map styling in general

Hope that helps!

On Mon, Feb 6, 2017 at 1:06 PM, Svetlana Tkachenko <svetlana@members.fsf.org> wrote:

Are we even building our own tiles? I thought the 'Wikimedia maps' is
just an interface to OSM.

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Erika Bjune

Engineering Manager - Discovery

Wikimedia Foundation

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